Machinery for grinding or polishing cross-head guides



(No Model 2 Sheets-Sheet I.

C. T. PARRY. MACHINERY FOR GRINDING OR POLISHING GROSS HEAD GUIDES. No. 270,106. Patented Jan. 2, 1883.

FIG. 2

WI T N E3515 5 c P IN VE'N T011 N. PETERS. Pholo-Lilhngnnhur, Waihingion. D c.

2 Sheets-Sheet 2 (No Model.)

' c. T. PARRY. MACHINERY FOR GRINDING 0R POLISHING OROSS HEAD GUIDBS.,

Patented Jan. 2-, 1883 INVENTOR;

FIG.5.

@JY' w NEssEs:

- UNIT D STATES PATENT Cri ics...

CHARLES 'r. PARRY, on PHILADELPHIA, PENNSYLVANIA.

MACHINERY FORGRINDING OR POLISHING CROSS HEAD GUIDES.

SPECIFICATION forming part of Letters Patent No. 270,106, dated January 2, 183.

' Application filed November 6, I882. (No model.)

To all whom it may concern:

Be itknown that 1,. CHARLES T. PARRY, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Machinery for Grinding or Polishing Gross-Head Guides, of which the tollowing is a specification.

My invention consists of certain improvements in |nechanism ,fully described hereinafter, for quickly and truly facing, by grinding and polishing, the guides for the cross-heads of locomotive-engines.

In the accompanying drawings, Figure 1, Sheet 1, is a side view of my machine for grinding or polishing locomotive-guides; Fig. 2, a plan view; Fig. 3, averticalsection on the line 1 2. Fig. 1; Fig. 4, Sheet 2, a perspective view of the machine; Fig. 5, a vertical section on the line 3 f part of the machine, drawn to an enlarged scale; and Fig. 6, a section on the line 5 6,also drawn to an enlarged scale.

To guides on a frame, A, similar to that of an ordinary metal-planing machine is adapted a bed-plate, B, which is caused to traverse to and fro on the frame by any suitable mechanism,a screw being in the present instanceused in connection with driving-gear for thispurpose.

To the bed-plate B are secured a series of supporting-blocks, D, in the recessed portions of which is placed the guide W, the latter being secured by clamps d.

An extension, A, from one side of the frame A carries a head-stock, G, having bearings for a spindle, H, to which are secured the pulley f for a driving-belt, and a lap-wheel, I, whichv is composedof the inner portion, t',of lead, and the portion m, of cast-iron, into which the lead is cast. The head-stock is adapted to guides on a plate, F, which is pivoted at y to the extension A of the frame, a screw-shaft,

E, furnished with a suitable hand-wheel, n, serving to move the head-stock with its guides and to keep the lap-wheel up to its work. The plate F and head-stock can be tilted on the pivot y, for a purpose explained hereinafter, the device for effecting this adjustment consisting in the present instance of a wedge or key, M, Fig. 1, interposed between the said plate and a projection on the end of the ex- I tension A of the frame, the wedge beingcontrolled by a screw, 1).

A link, q, is pivoted to theunder side of the in the extension of the frame to which the lever is pivoted at s. A nut adapted to a screw, t, is swiveled to the outer end of this lever, the screw being arranged to turn in a bracket on the frame, and being furnished with a suitable handle.

The object of the above-described mechanism isto hold the plate F and its head-stock firmly in place after adjustment, this being accomplished by turning the screw t so as to depress the lever Nand draw the plate down tight on the wedge.

The axis of the spindle H is not quite at right angles horizontally to the guides which the bedplate traverses, so that the face of the lap-wheel, instead of being parallel with the said guides, is at a slight angle in respect to the same; hence a limited portion only of the lap-wheel acts on the guide.

The guide W to be faced by the lap-wheel is in the first instance placed on the blocks D so as to be parallel with the guides of the bed-plate,after which it is secured by the clamps f d, and the mechanism for traversing the bedplate is set in motion, the result being the accurate facing of the guide by the lapwheel.

The object of the tilting adjustment of the plate F and head-stock is as follows: If on v adjusting the head-stock by means of the screw Eprior to setting the machine iumotion, so as to move the lapwheel up to its place, it should be found that the face of the guide to be ground is not at right angles to that face which rests on the blocks-that is,if either top or bottom of the guide is outot' line throughout its entire length, and would require unnecessary cutting or grinding to reduce it to the proper plane--I adjust the face of the lapwheel by moving the plate F on its pivot until the said wheel is parallel with the face of the guide, thereby obviating the necessity of blocking the, latter up.

A reciprocating work-supporting bed has heretofore been combined with a reducing- Wheel on a spindle carried by a frame which could be so tilted as to alter the position ofthe face of the wheel in respect to the bed. This, therefore, I do not claim broadly; but

I claim as my invention-- 1. The combination of the reeiprocated bed B, adapted to guides on a frame, A, and the plate F, carrying thehead-stock G, the spindle, and lap-wheel, and pivoted in front to the frame of the machine, with the screw t and intervening mechanism, whereby .thesaid screw can be made to raise or lower the said pivoted plate at the rear, all substantially as set forth.

' 2. The combination, with the frame of the machine, of the pivoted plate F and its headstock, and a wedge, M, interposed between the said plate and the frame of the machine, substantially as described.

3. The combination of the pivoted plate and 15 wedge M with the link q, lever N, and screw t, having a nut swiveled to the lever, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two sub- 20 scribing witnes es.

CHAS. T. PARRY.

Witnesses:

HARRY DRURY, HARRY SMITH. 

